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Softening Resin Filter Cation Ion Exchange 4.5" x 20" Big Blue Size


SKU CAT-4520

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The CAT-4520 softening cation resin filter is used for the reduction of hard water using an ion exchange process.

The CAT-4520 water softening filter cartridge reduces hardness minerals and scale deposits in low flow rate residential and commercial applications. It is made of NSF Certified cation softening resin that meets FDA (Food and Drug Administration) standards. The CAT-4520 includes polypropylene pre- and post-filters to reduce sediment and the possibility of water bypassing the resin.

This water softening filter cartridge is used for treatment of residential and commercial water.

CAT-4520 Softening Filter Cartridge Specs:
  • 5,889 Max grain capacity
  • FDA NSF Certified Cation Softening Media.
  • Refillable / Reusable
  • Max Flow Rate: 2 GPM
  • Made from FDA and NSF Certified materials
  • Fits 4.5" x 20" whole house water filtration systems including Big Blue Housings
  • End Caps: High impact
  • Body: Polystyrene
  • Gasket: Buna-N
  • Size: 20" x 4.5"
  • Max Temp: 100 F

Replace or regenerate every 5,889 grains usage (approx 2-3 months of regular use) or when softening performance is reduced. Life capacity depends on hardness and water quality.

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